Talk:Luhn algorithm
When converting every other digits (e.g. 8 -> 16 -> 7), the doubling step helps check for people who accidentally swapped adjacent digits (e.g. 1234->1243). But what's rationale behind converting 16 to 7?
When converting every other digits (e.g. 8 -> 16 -> 7), the doubling step helps check for people who accidentally swapped adjacent digits (e.g. 1234->1243). But what's rationale behind converting 16 to 7?